package com.sanery.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.sanery.entity.User;

@WebFilter("/*")
public class LoginFilter implements Filter {
	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
			throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) res;

		// 如果是登录页直接放行
		if (request.getServletPath().equals("/login")) {
			chain.doFilter(request, response);
			return;
		}

		HttpSession session = request.getSession();
		User cur_user = (User) session.getAttribute("cur_user");
		if (cur_user == null) {
			response.sendRedirect("login");
			return;
		}

		// 放行
		chain.doFilter(request, response);
	}

	@Override
	public void destroy() {
		// TODO Auto-generated method stub

	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub

	}
}